{ name: "Lydia", age: 21 }, ["name", "age"]

{ name: "Lydia", age: 21 }, ["name"]

{ name: "Lydia"}, ["name", "age"]

{ name: "Lydia"}, ["age"]

"{"level":19, "health":90}"

"{"username": "lydiahallie"}"

"["level", "health"]"

"{"username": "lydiahallie", "level":19, "health":90}"

10, 10

10, 11

11, 11

11, 12